Since April 2018, electrical tests have been carried out at the demonstrator road close to Arlanda, with the electric truck charging while driving. The truck has currently (April 2020) driven 532 km on the demonstrator while charging at the same time. During these tests, technical problems have been identified and solved by further development of the Elways ERS technology.
The electric truck during a test on the demonstrator road.
Tests of the electric road’s control system
Switching cabinets are located along the electric road, containing electronics with which it is decided whether the electric power rail should be energized or not. During tests in 2018 it occasionally happened that this control system did not recognize when the truck was located on the power rail, resulting in no power going into the truck. This could be solved by improving the signal transmission components in the truck and in the switching cabinets. Since the beginning of 2019, the truck is consistently recognized by the control system and the power is switched on at the right place and time.
The electric truck passing by with its current collector submerged in the power rail.
Improved cleansing machinery
It is necessary for the power rail’s conductors to be sufficiently clean in order to enable high power transfer from the rail to the vehicle. Continuous development work of a machine for cleaning the rail has been performed.
The cleaning machine in its current state.
The power rail after having been cleaned by the cleaning machine.
Several successful test runs have been carried out with the truck charging at 60 km/h with a power of 120 kW along the road. The graph below shows a power and energy measurement from one of these test runs. The tests are still ongoing and the power will be increased even further.
Power and energy measurement during a test run at the demonstrator road.
The demonstrator road, with its electric power rail in the middle of the road path.